Feed-water heater.



J. H. KIDWELL.

FEED WATER HEATER.

APPLIOATIOI nun IAB. 21, mos.

901,245. Patented Oct. 13, 1908.

3 BHBBTk-BHEET I W/TNESSES v v INVENOR 15 6 JA M ES H. K I 0w ELL K By /ll d/[IILM ATTORNEYS J. H. KIDWELL. FEED WATER HEATER.

APPLIOATIOH rum) n12. 21. 1908.

901,245. Patented Oct. 13,1908.

8 SHEETS-SHEET 2.

INVENTOH WITNESSES 4 TTORNEYS JAMES H. KIDWELL.

J. H. KIDWELL. FEED WATER HEATER.

Patented Oct. 13, 1908 3 SHEETS-SHEET 3.

. mmvroa JRMES H. K I ow: LL.

ATTOflA/EYS the smoke box.

JAMES H. KIDWEIJL, or STAUNTON, VIRGINIA.

'imnn-wa'ma HEATER.

Specification of Letters Patent.

, Patented Oct. 13, 1908.

Application filed latch 27, 1908. Serial No. 428,643.

pose of heatingfthe feed water, as w as using the hot gm and smoke in the smolee box at the front'of the boiler for same pur se. p p

T e heater comprises an annular casing or shell which is placed in the smoke box and which contains a series of tubes'through which the exhaust steam flows from the cylinders, and the feed water entering at one end of the shell flows through the same and around the tubes, whereby it is heated, the outside of the shell at the same time be ing exposed on the outside to the. ases in Means are prouided for cutting out the heater and feeding direct to the boiler when necessary or desirable. The device uses heat which would otherwise be wasted and raises the feed water to a high temperature before it reaches the boiler. A considerable saving of fuel, and quicker steaming, is thereby effected.

The invention is illustratedin the accompanying drawings, in which Figure 1 is a partial side elevation, part of the boiler shell being broken away, of the left side of a locomotive provided with the device. I Fig; 2 is a similar view of the right side. .Fig. 3 'isa vertical longitudinal sec tion of the heater. Fig. 4 is a vertical cross sect1on. Fig. dis a detail in section.

Referrin specifically to the drawings, 6

I indicates t e two feed. pipes leading from the injectors to the boiler and these are provided with check valves at 7 and 8 and enter through the boiler shell into the smoke box where they are honnected to one end of the casing of the feed water heater at 9.

The outlet fromthe heater to the-boiler is provided by two pipes 11 leading from the opposite end of the heater shell into'the boiler, and provided with suitable check valves as at 12. For direct supply to the boiler jeach pipe 6' has a branch 13, leading braced at the middle b directly to the boiler and provided with plug cocks l4 and check valves 15; and by openin the plu cooks the water will be injects into the oiler directly through the branches. 1

The heater consistsof a tubular casing 16, of annular form, and of proper sizeto fit within the extension or smokebox at the front of the engine. This shell or casing is closed at opposite ends'by heads 17 and 18, located opposite to each other in the lower part of the casing and spaced apartto f rm a chamber which is divided by an inclin partition 19, into two parts, one of which receives the xhaust steam from the cylinders through a p pe 20 and the other of which opens into the exhaust nozzle 21 located as usual under the stack. The inlet and outlet chambers in the heater are connected by a plurality of tubes 22 which extend around within the shell and between the heads 17 and 18 to which their ends are fastened by suitable nuts. The tubes are a plate 23 with tapped holes large enoug to allow the tubes to pass through and to receive split threaded bushings 24 to hold the tubes in place. he brace plate is spacediat its edges from e shell, as shown at 25, to allow the water to circulate, and isheld in place by lugs 26 bolted to the shell.

Steam entering through the pipe 20 passes aronndthrough the tubes 22 and out through the nozzle 21. .VVater injected through the pipes 9 circulates around said tubes and to the other end of the casing, and thence to the boiler through pipes 10. a As stated, the casin' is in the smoke box and is thus pose on the outsi l i to the smoke and gases after they pass through the boiler tubes. This utilizes heat which would otherwise be wasted and owing to the resultinghigh temperature of the heater there is very little condensation of the exhaust st. .1111. 'l'he feed water is, in effect, between the steam on the inside and the fire on the outside. and inasmuch as the heater-is at all times underboiler pressure the water can be heated to a very high degree before being delivered to the boiler. Necessarily the heater will be built sufficiently strong and heavy to stand the pressure under which it has to worknand owing to its annular form will. fit cm'gi m iently into the extension front of the boiler shell.

The construction is ca able of modification and 'no limi ation Wltl l respect thereto is im lied.

claim 5 1. A water heater for locomotives, comprising an annular shell having a water inlet at one end and a water outlet to the boiler at the other end, steam tubes extending around lengthwise within said shell and connected at one end to the exhaust. pipe from I the cylinders and at the other end to the exhaust nozzle, and a brace plate extending across the shell intermediate theends of the tubes and havi holes through which said I 15 pipes extend, said brace late having 0 nmgs for the circulation 0 water in the s ell.

2. A water heater for locomotives, comprising an annular shell, said shell being provided with beads spaced apart from each other to form a chamber, an inclined partition dividin said chamber into two portions, one 0 said ortions being connected with the exhaust o the locomotlve and the other opening into the stack, steam tubes extending len hwise within the shell and 25 opening into t e chamber, and a brace plate extendmg across the shell intermediate the ends of the tubes and havin holes within which said pi cs extend, said plates having openin for t 1e circulation of water within 39 the she I. A

JAMES H. KIDWELL.

-- Witnesses i Hucn H. Kenn, JOHN B." COCHRAN. 

